launch_script_stream << "cd " << work_directory << std::endl;
launch_script_stream << "export PYTHONPATH=" << work_directory << ":$PYTHONPATH" << std::endl;
launch_script_stream << "export PATH=" << work_directory << ":$PATH" << std::endl;
if (_env_file != "")
{
std::string::size_type last = _env_file.find_last_of("/");
launch_script_stream << "cd " << work_directory << std::endl;
launch_script_stream << "export PYTHONPATH=" << work_directory << ":$PYTHONPATH" << std::endl;
launch_script_stream << "export PATH=" << work_directory << ":$PATH" << std::endl;
if (_env_file != "")
{
std::string::size_type last = _env_file.find_last_of("/");